Whistle



FIG. 1 is a top perspective view of a whistle showing our new design;

FIG. 2 is an end elevational view thereof taken from the left of FIG. 1;

FIG. 3 is an end elevational view thereof taken from the right of FIG. 1;

FIG. 4 is a side elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a whistle, substantially as shown and described. 